The Australian Chamber Orchestra (ACO) is a renowned Australian orchestra based in Sydney. Founded in 1975, the ACO is known for its innovative programming, which includes both classical and contemporary works. The orchestra has toured extensively around the world and has performed at major venues such as the Sydney Opera House, the Royal Albert Hall in London, and Carnegie Hall in New York City. The ACO has also collaborated with many of the world's leading composers and musicians, including John Adams, Philip Glass, and Yo-Yo Ma. The ACO's mission is to promote the performance of Australian music and to bring the best of the world's classical repertoire to audiences around the world.